{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Quantitative data from UHPLC and qualitative studies using HPLC - DAD - MS showed that in addition to commonly found phenolic acids , flavonoids and anthocyanins , R . hirta fruit contained a novel group of unique anthocyanins with aglycones ( anthocyanidins ) at 449 , 419 and 433 Da ."}
{"Chemical": ["phenolic acids", "flavonoids", "anthocyanins", "anthocyanidins"]}